Machine for forming holes in dynamite cartridges



- Sept. 15. 1925 1,553,481

R. H. STRA'FTON MACHINE FOR FoRMiNG HOLESIN DYNAMITE-CARTRIDGES 7 Filed March 18, 1925 2 Sheets-Shae. 1 I

Sept. 15. 1925.

R.-H. STRATTON MACHINE FOR EORMING HOLES IN DYNAMITE CARTRIDGES 2 Sheets-Sheet 2 FIG. 3.

Filed March 18, 1925 Snoeuloz f Patented Sept 15, 192:5.

' that the operator may perform the work in .}dicated', with a minimum of fatigue and 7 EC 5.] i if?) almanaor -e anr, .cet roan aAssistant To Arms Bowers-ea:

rwiorwrrumerolt 'rr ew naa QQn-ro aT oN or DELA ARE A m m r03 Famine Horns IN JYNA1VIITE GARTRIDGESI Ap ication reana ch 18,1925. Serial No. 16,26 9.

floaZZ whom it-may concern: 1 Beitknown that R GHARD Srnar'ron', V, a citizen of theUnited-States, residlng' at Giant-,fin thecounty'iof Contra Costa and {State of-Californ ia, has invented certain new and useful Improvements in Machines for Forming Holes in-Dynamite 'Gartr'idges, otwhichthe' renewin isa specification; I This invention relates-t0 a machine for iiorminjg holes dynamite cartridges forthe q reeeption'oftheeiploders Iii-tunnel blast ing delay action eXplod-ers are employed.

These range from-a in-o delay which measures about 3 inches long to a N05 8 delay .7 s r which, is iew males i long. In order that thesedelayexploders maybe'properly in- 3 Q serted "the particular, dynamite "cartr idgefwhich is tofc'onstitute'the priming oariijfltridge of a charge, which may consist of 2 quite a number oztis'tieks of dynamite, it is I necessaryto form a hole in the gelatine of thecartridge; i leretofiorethis has been aceornpl ished-bythrusting a tapered 'stick into I the priming cartridgebyhandp"Under this c gud'e method it isg-"exceedingly d-iflieu-lt to I keep theghole centrallyelocated with respect to'the' cartridge-i lit-the hole is not centrally located with respe'et'to the cartridge and the exploder gets too near the side walls of the cartridge there is grave danger of a prema- -"t1 1=re;eXp los'i0n, eitherd-u-ring the time that the cartridge is being 'p'l-aced in' the bore I hole or during the ramming of the cartridge after hein-gplaced 'in-the bore hole. I j 7 1g; The primary object "oi? the present invene tion is, therefore, to provide a machine con ruct dpof nonpa k ng" mat r l ro g out and arranged to form the necessary holes 2 in 'the priming dynamite cartridges, said machine being so constructed and arranged with'a maximum of safety and efiiciency; V

In the'accompanying drawings, wherein ,"like characters ofreferencedesignate corre sponding parts throughout the several'figures, v" Figure l is aside elevationof the machine constructed in: accordance with the invenf WFigureI'2 is a -p1an;view 'of'said'machine, J ----Figure 31s an end elevationof'thiamachine,

{Figure 4 is a transverse sectional View on line of Figure 1.

Figure "5 his a perspective view-'of' the shuttle, l p p R Q V Figure 6 is 'a; transverse section-thr gh the "shuttle, j I 1 I Figure'7 'i-sfa sectional view of'thehead of the spiral, r o.

V Figure 8 is-a sectionalview through the bearing block of thespi-ral.

" Intheidrawings,5 (IGSlgIlfltGSiit horizontal.

table w hi'eh constitutes a support for-a'woode hmtle 6,"having a concave seat its upper face that is adapted to 'receive the cartridge to be-punched. The'jo ppos'ite ends o f-f this concave seat are closedby sheets offibre 7'and '8 which Properly'position the stick of.

dynamit and prevent-it from "shitting endw se during the penetration of the punch, and during the withdrawal of said-punch,

legs and '11, is disposed at that end of the table which carries-the shuttle 6, and-in such position that an operator seatedthereon nlay grasp a handle 12 and through thefmedi-um of a "link swingalever 14 upon the pivot V 15. This pivot isoarried'by the'outer ends, of links 1-6 and-these links, areinturn, pivot? ed'atl? to'a fulcrum bolt 18, the shank of An 'operator s seat 9,that issupported-upon which is eng aged by a; nut 19, Braces 20- and 21' impart the necessary" rigijdityu andf' I strength to the structure. Thelever -l4*com' prises a yoke 22 intermediate its ends and the side'soi this yoke are engagediby pins 23 of a split ring 24; which-is mounted i-na grooved head 2510f a spirallygrooved bar 26. This-bar is'mounted for reciprocation and rotation through a brass block 27 that is mounted upon the table 5. The spiral bar,

hereinafter referred to as the spiral, is pref- I erably made of bronze and carries a tapered bronze punch 28. -When the spiral and, v

punch are drawn toward the shuttle by the operation of the handle 12 and lever 14 romay enter the stick of dynamite; 'Qpenings loOf 30, formed in the bottom ofthe shuttle, perg mit the passage of the sawdust from the dynamite cartridge to be discharged through corresponding openings 31 of the table, so that after a cartridge has been punched the shuttle may be rendered perfectly clean and free of any residual dynamite, the presence of which might, otherwise, tend to destroy the centered relation of dynamite and punch. To facilitate the act-ion of the mechanism and to help support the weight of the levers, a spring 32 is connected at 83 to the table and at its opposite end to the pivot 15.

The machine herein shown and described is constructed in such a manner that the work of punching the cartridges may be performed with great speed and with a minimum of trouble upon the part ofthe operator. In use the operator seats himself at the rear of the machine with a box of cartridges on one side and an empty box on the other. He places a cartridge in the shuttle and by means of the handle pulls the punch toward him, thus causing the punch to revolve. The operator continues to pull until further motion is prevented by the stop, at which point the punch has penetrated the cartridge to the required depth. The punched cartridge is then placed in the empty box and the sawdust brushed through the holes. A new cartridge is then placed in the shuttle and the operation repeated.

In some of the" machines heretofore proposed for this purpose it was necessary for the operator to place the cartridge in a vertical shuttle and to hold said shuttle closed with one hand while operating the punch with the other. This placed the operator in a very awkward position and he was unable to apply his strength to the best advantage. Furthermore, it was difficult to with draw the punch and no provision was made to remove the sawdust from the shuttle, with the result that the presence of this sawdust frequently destroyed the alignment of the cartridge and punch.

a It is to be understood that the invention is not limited to the precise construction set forth, but that it includes within its purview whatever changes fairly come within either the terms or the spirit of the appended claims.

Having described my invention what I claim is:

1. In av machine of the character described the combination with a seat for a dynamite cartridge, disposed in a substantially horizontal plane so that a cartridge may rest therein by gravity, of a punch movable in a horizontal plane adapted to pierce a cartridge disposed in said seat.

2. In a machine of the character described the combination with a seat for a dynamite cartridge, disposed in a substantially horizontal plane so that a cartridge may rest therein by gravity of a rotative punch movable in a horizontal plane adapted to pierce a cartridge disposed in said seat.

3. A machine of the character described comprising a supporting table having an operators seat at one end, a horizontally reciprocating punch at the opposite end, and a concave seat for a dynamite cartridge between the punch and operators seat, in combination with manually operable means by which the operator may reciprocate the punch toward and from him.

4. A machine of the character described comprising a supporting frame work, an operators seat at one end thereof, a horizontally movable punch and spiral at the opposite end thereof, a concave seat for a dynamite cartridge between the punch and the operators seat, and manually operable levers by which an operator seated upon said seat may reciprocate the spiral and punch toward and from him.

5. A machine of the character described comprising a supporting frame work, an

nature.

RICHARD H. STRATTON. 

